An Italian eatery just steps from Yankee Stadium is charging customers for slices of pizza — and sex with their wait staff, a new lawsuit claims.

Yankee fans heading to Stadium Pizza after ball games are treated to a smorgasbord of waitresses and bartenders moonlighting as prostitutes, according to a lawyer for former employee Olga Contreras, who is suing the restaurant’s owners for sexual harassment, said her lawyers, Matthew Blit and Amanda Gudis.

Contreras says she has spotted one worker frequently giving oral sex, and customers disappearing into the restroom with the staff.

In documents filed yesterday in Bronx Supreme Court, Contreras, 29, says she was forced to clean up “numerous used condoms,” but never prostituted herself while working at the dive from 2005 to 2012.

She claims that, because the owners forced her to lift heavy items, she suffered a miscarriage after she got pregnant by her boyfriend.

In March, the owners, Tania Jimenez and Francisco Almonte, fired Contreras after she walked into the kitchen and said in broken English, “I am hungry,” the papers state.

When a Post reporter called for comment yesterday, the eatery’s phone was not working.